[dpdk-web] download links of DPDK hosted projects

[Thomas Monjalon]

In the following page: https://www.dpdk.org/hosted-projects/
there are some links "Latest Release" which are outdated.

I propose to replace them with a "Download" link which
goes to the list of releases. Examples:
	https://git.dpdk.org/apps/pktgen-dpdk/refs/
	https://git.dpdk.org/tools/dts/refs/
	https://git.dpdk.org/apps/spp/refs/

Then the link "Git Repo" of DTS should be replaced to:
	https://git.dpdk.org/tools/dts/